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CERT Advisory CA-99-16 Buffer Overflow in Sun Solstice AdminSuite Daemon
sadmind

   Original release date: December 14, 1999
   Last revised: --
   Source: CERT/CC
   
   A complete revision history is at the end of this file.
   
Systems Affected

     * Systems that have sadmind installed
       
I. Description

   The sadmind program is installed by default in Solaris 2.5, 2.6, and
   7. In Solaris 2.3 and 2.4, sadmind may be installed if the Sun
   Solstice Adminsuite packages are installed. The sadmind program is
   installed in /usr/sbin. It can be used to coordinate distributed
   system administration operations remotely. The sadmind daemon is
   started automatically by the inetd daemon whenever a request to
   perform a system administration operation is received.
   
   All versions of sadmind are vulnerable to a buffer overflow that can
   overwrite the stack pointer within a running sadmind process. Since
   sadmind is installed as root, it is possible to execute arbitrary
   code with root privileges on a remote machine.
   
   This vulnerability has been discussed in public security forums and is
   actively being exploited by intruders.
   
II. Impact

   A remote user may be able to execute arbitrary code with root
   privileges on systems running vulnerable versions of sadmind.
   
III. Solution

Disable sadmind

   Remove (or comment) the following line in /etc/inetd.conf:
   
   100232/10 tli rpc/udp wait root /usr/sbin/sadmind sadmind
          
   Even though it will not defend against the attack discussed in this
   advisory, it is a good practice to set the security option used to
   authenticate requests to a STRONG level, for example:
   
   100232/10 tli rpc/udp wait root /usr/sbin/sadmind sadmind -S 2
          
   If you must use sadmind to perform system administration tasks, we
   urge you to use this setting.
   
   Appendix A contains information provided by vendors for this advisory.
   We will update the appendix as we receive or develop more information.
   If you do not see your vendor's name in Appendix A, the CERT/CC did
   not hear from that vendor. Please contact your vendor directly.
   
Appendix A. Vendor Information

Sun Microsystems

   Sun Microsystems is currently working on patches to address the issue
   discussed in this advisory and recommends disabling sadmind.
     _________________________________________________________________
   
   The CERT Coordination Center thanks Sun Microsystems for its help in
   providing information for this advisory.
   ______________________________________________________________________
   
   This document is available from:
   http://www.cert.org/advisories/CA-99-16-sadmind.html
   ______________________________________________________________________
   
CERT/CC Contact Information

   Email: cert@cert.org
          Phone: +1 412-268-7090 (24-hour hotline)
          Fax: +1 412-268-6989
          Postal address:
          CERT Coordination Center
          Software Engineering Institute
          Carnegie Mellon University
          Pittsburgh PA 15213-3890
          U.S.A.
          
   CERT personnel answer the hotline 08:00-20:00 EST(GMT-5) / EDT(GMT-4)
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   Copyright 1999 Carnegie Mellon University.
   Conditions for use, disclaimers, and sponsorship information can be
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   ______________________________________________________________________
   
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   Any material furnished by Carnegie Mellon University and the Software
   Engineering Institute is furnished on an "as is" basis. Carnegie
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     _________________________________________________________________
   
   Revision History
December 14, 1999:  Initial release

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